Here is the explanation of how the Penile Traction Device works to extend the size.

When your Size Doctor® Penis Extender is worn, it stretches the length of the penis. This process does not happen overnight. It is a tension that stretches the penis when worn over an extended time period.

You will wear your new Penile Traction Device for a period of time each day. Progress will depend on the length of time it is worn. The term "penile traction" is a descriptive term of the science that allows the Size Doctor® Extender Device to do its job. Although it may sound like a pain-inducing process, it is not because it occurs on a microscopic level. It is a tearing and healing process called Mitosis and Cytokinesis.

Let us examine how this cellular function facilitates penis extension in length and girth. As your penis is put into traction, it is impacted by a calibrated tension system, which is caused by the Size Doctor® Extender. Tears form on the shaft of the penis. Keep in mind these are not visible to the human eye. The other fact to keep in mind is the process causes you no pain whatsoever.

Your body will react to the traction causing the microscopic tears by healing them. In the course of the healing process, the scientific cellular procedure performed by the body is the dividing of cells. This is a scientific process the body repeats called cellular division. As the tissue cells of the penis divide repeatedly, the microscopic gaps are filled in and so lengthen the penis.

The entire healing process, performed by your own body, is Mitosis and Cytokinesis. The cellular growth is not coming from an outside, artificial source. It is coming from your own body's ability to heal itself.

Consider what happens when you are wounded, as in a scraped knee. The body repairs itself by healing over and forming a scab to protect the wound. Eventually the scab is no longer needed and disappears. The tiny spaces in your penile tissue are filled in and those spaces disappear when no longer needed. This is the growth you will experience in penis length and girth. Over time, you will see the results. This resulting increase in size will happen due to the natural scientific principle of Mitosis and Cytokinesis. It is no mysterious process, it is science at work.

Penis Pump Process

The theory behind Penis Pumping is to increase the blood holding capacity of the penis by using a vacuum device (Penis Pump) to decrease the atmospheric pressure around it. When air is extracted, a void is created in the cylinder that causes the penis to enlarge in an attempt to fill the void. This enlargement is the expansion of: skin, blood vessels, the corpus cavernosa (CC), corpus spongiosum (CS), the tunica, and the pulling in of lymphatic liquids. The vacuum also creates pressure on the ligaments, which helps with permanent penis enlargement aspects.

The expansion of the penile tissues is mostly in accordance with the amount of vacuum generated. The forces generated are created by the differences in atmospheric pressure. Normal atmospheric pressure outside the cylinder and near the point of contact (your pubic bone area) will force blood to rush in to satisfy the differences between that pressure and the one inside the cylinder.

In fact, the penis can expand well beyond the normal erect dimensions thereby creating the proper conditions to stimulate growth. Eventually, with repeated sessions, these cellular tissues under the forces of expansion will gradually adapt to more stress as your workouts continue to progress and this should result in permanent gains over time.

Jose on 09/26/12"If I knew what I knew now I would of had one years ago. I see it as something that every male should have and use. No matter how young or old."

Ryan on 02/14/11"I've tried many things before for size increase and this is by far the best I've ever used."

Mike N. on 04/10/12"Don't pay a ton of cash for other products! This product is just as good, if not better than the others. Don't waste 200 on others, when this one is mid 60!"

Benjamin on 12/06/11"I liked that I also got an instructional DVD and brochure to read as well, telling me how long to wear and when the next time increase was."

J. Caplinger on 11/04/11"For the price you can't beat this. It can take a little getting used to, but compared to paying $250 and up for similar products it's a steal!"

Terry on 02/16/12"I've gained 3/8" in only 3 months, well on my way to my 10" goal."

Kai on 03/19/12"If you use common sense and use how it's instructed...slow gains and slow increases week by week. In 6 months you should be 1/4in - 1/2 inch bigger. Just think how much longer you could be after a year of use or more!"t

Wraith on 08/18/12"Easy to use and convenient. I would recommend this product to anyone who is trying to increase their size in a safe effective manner. A great deal considering what you are getting from this product."

WEG 09/06/12"If you are considering surgery, why not give this a try first? What have you got to lose? Ever see the TV show manswers? It’s like a guys, "myth busters". They will recommend this product!"

John on 04/03/12"Excellent quality! I Real Results! After the first week I noticed immediate results."

Karl on 07/21/12"I notice some people are sayin that it hurt them. That's cuz they are impatient. I followed everything it said to do in the instructions and felt no discomfort."

David on 06/21/11"It is now march and my extender is set 2 inches longer then it was when I started in December and my penis has grown a little over an inch in length."

Samuel 05/11/12"Just the same as well going to the gym to work out, lift weights, to lose weight and to gain strength and endurance, this tool works much the same way."

Peter on 11/01/12"As it has been mentioned, getting the higher priced devices is not worth it, much like a gym is a gym, each tool does the same thing - fancy packaging is for the eyes only."

Robert on 08/19/12"I want to point out that about a month and a half into my program I lost one of the springs from the rod assembly. I dropped these folks a line and had a new spring in a dayl! Got to love good service!"

DISCLAIMER: STATEMENTS ON THIS WEBSITE HAVE NOT BEEN TESTED OR EVALUATED BY THE FOOD AND DRUG ADMINISTRATION (FDA). THESE PRODUCTS ARE NOT INTENDED TO DIAGNOSE, TREAT, CURE, OR PREVENT ANY DISEASE OR HEALTH CONDITION. IT IS MEANT TO BE SOLD AS A NOVELTY ONLY.